It's a bit worrying that the
Plan My Journey page states
Journey planners are currently up to date, up to and including Sunday 9th January.
So only up to date if you are not planning a journey from tomorrow onwards?
SWR» announced the reduced timetable on, I think, 30th December. At that time I think the horizon was 9th January, but with cancellations on the day to be expected. Having a reduced timetable is meant to reduce that, of course, which is why
DfT» was twisting
TOCs▸ arms to come up with one. I get the impression they were resisting, presumably because that would mean assuming a level of staffing, and it just wasn't predictable.
The other problem is that to almost remove on-the-day cancellations, over al the separate staff groups they need, means planning for staff availability of (I'm guessing here) about 70% of the average you expect based on recent experience. For those calling for such a timetable that's a "be careful what you wish for".
I had a look at what National Rail say about about when in the future the
OJP▸ is populated with data. It does not make a lot of sense. Under "Advance Tickets and Seat Reservations" it says for SWR:
Saturday service:
26 February
Sunday service:
27 February
Monday to Friday service:
25 March
Latest time of reservation:
Advance tickets are available up to 23:59 the day before travel.
Notes:
South Western Railway do not offer seat reservations but have quota controlled advance purchase products.
And under "Temporary Timetable Changes, Expected Journey Planner availability":
Unless listed in the Train Operator details below, these dates are when the journey planner is expected to be showing correctly in the journey planner
Saturday 19 to Friday 25 February
Should be available from Monday 10 January.
[and a week later for each later week of six.]
This is listed under for SWR:
Saturday:
8 January
Sunday:
9 January
Monday to Friday:
7 January
Notes and exceptions:
Some services on 15 / 16 January and from 12 - 18 February are currently showing incorrectly. You can check your journey here.
I think that (like the Plan My Journey page) says "we've been thinking how to do this but it still defeats us".